On Sun, Oct 25, 2015 at 05:31:52PM +0300, Vladimir Lettiev wrote: > Hi. > > Just got a build failure with recent gcc with enabled option FORTIFY_SOURCE=2: > > In function 'strncpy', > inlined from 'rip_outgoing_authentication' at > ../../../proto/rip/auth.c:134:5: > /usr/include/bits/string3.h:120:10: error: call to __builtin___strncpy_chk > will always overflow destination buff > > There is proto/rip/auth.c:134: > > strncpy( (char *) (&block->packetlen), passwd->password, 16); > > destination packetlen is u16, so gcc thinks it is overflow. > > Is it possible to change strncpy with memcpy?
No, memcpy would not work. You could replace '(char *) (&block->packetlen)' with: (char *) block + OFFSETOF(struct rip_block_auth, packetlen) -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."
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